Henry steeg-er



uiten tetes getraut ffies.

HENRY s'rnnenn, or New YORK, N. Y.

I Letters Patent No. 72,760, dated December 31, 1867.

IMPROVEMENT IN THE CONSTRIIGTION 0F HOT-WATER ISOILERS.

dige Sdgetnle referat tu tu tlgcst Etnias ntntt ma mating prut nit tigesana,

TO ALL WHOM IT MAY CONCERN:

Be it known that I, l-IENRY STEEGI-m, ofthe city and State of New York,have invented, made, and applied to use, a certain new and usefulImprovement in Boilers for Hot Water, Src.; and I do hereby declare thefollowing to be a full, clear, and exactdescription of the saidinvcntion,.re`erence being had to the annexed drawing, making part of'lthis specification, whcrein- Figure 1 is a section of a boiler, showingthe shape ofthe parts before they are connected'together, and Figure 2is a section of said boiler, with the heads secured in place. Similarletters denote the sameparts.

Heretofore copperboilers for hot water have been made with headssoldered in; they have also been mad with the headsriveted on. In theirst-named mode considerable labor, expense, and time are requiredtoimake a proper connection of the head to the cylinder; in thesecond-named mode, the rivet-heads have an unsightly appearance, andcannot easily be kept clean and bright, as is desirable withhotwatcrboilers, in well-regulated kitchens; besides this, the pressuresometimes blows ofi` the heads, because the rivets have but avsmall-hold on the thin sheet metal.

The nature of my said invention consists in uniting the top and bottomheadsof the boiler to the cylindrical portion by circular beads andgrooves, formed in the sheet metal, where the two thicknesses of metalexist at the lap of the heads and cylinder. By this mode rivets aredispensed with, but little soldering is necessary, there is nopossibility of leakage, and the handsome appearance ofthe boiler is verymuch increased.

In the drawing, a is the cylindrical boiler, and b is the upper head,made of sheet metal, with the usual sockets or thimbles attached, andthe head is drawn down cylindrically at its edges of a. size to fit overthc cylinder a, as seen in iig. 1, I bend tho twoV thicknesses of sheetmetal by means of suitable rollers or tools, so as to form beads undgrooves around thev same in a circular form, as seen at c c, iig. 2, andI prefer thatl these grooves be formed with as sharp bends asconvenient, without injuring thc metal, in order that the'joint may bemade perfectly tight, with the use of but little solder. The said ribsor beads and grooves stifl'en the sheet metal, and make a tight andhandsome joint between the head and the cylinder. The bottom head, d, isto he introduced within the cylinder a, the bead e, formed inwardly inthe cylinder a, sustaining the same, While thcv lower edge of thecylinder a is turned over the cylindrical ilunge t' of` the head d,after which the two thicknesses of metal are formed or bent into theribs and grooves, as shownat 0, to connect the parts firmly together. iY Y By this construction thejoint of the head is as strong as any otherpart of the boiler, and injury from pressure is not likely to occur atthe joint any more than at other parts ofthe boiler.

It will be evident that by this mode of construction the head 11 can -befirmly secured in place before the bottom head d is put in, and that theflange z', of this head d, being just within the cylinder a, can be bentinto the grooves and ribs for securing it in place, and at the same timea base be formed for the boiler to stand on.

What I claim, and desire to secure by Letters Patent, is l The convexhead b, secured to the boiler a, by the ribs and grooves at c, incombination with the head d, setting within the lower end of the boiler,and its llunge z', secured by ribs and grooves at o, as and for thepurposes set forth. I

In witness whereof, I have hereunto set mysignature, this seventh day ofMay, A. D. 1867.

' HENRY STEEGER.

Witnesses:

FRED. ADEE, GEO. T. PrNcKNEY.

